"Sie mag (Accusative Adjective)->jede (Feminien and has no article 'die/ein' is present)Zeitung." Look at the table in the link and decide what it will come for Jede.
Well, "jede" = "every", and "alle" = "all". Saying that someone likes all newspapers (presumably all the newspapers that have ever existed) is not the same as saying someone likes every newspaper (which refers to either every newspaper there is or every newspaper in a set, or simply every newspaper this person has encountered).
why it is "Jede" in some sentence and "Jedes" in another?? any particular reason?